package edu.nps.moves.dis;

import java.io.*;

/**
 * 5.3.35: Information about a particular UA emitter shall be represented using
 * an Acoustic Emitter System record. This record shall consist of three fields:
 * Acoustic Name, Function, and Acoustic ID Number
 *
 * Copyright (c) 2008-2016, MOVES Institute, Naval Postgraduate School. All
 * rights reserved. This work is licensed under the BSD open source license,
 * available at https://www.movesinstitute.org/licenses/bsd.html
 *
 * @author DMcG
 */
public class AcousticEmitterSystem extends Object implements Serializable {

    /**
     * This field shall specify the system for a particular UA emitter.
     */
    protected int acousticName;

    /**
     * This field shall describe the function of the acoustic system.
     */
    protected short acousticFunction;

    /**
     * This field shall specify the UA emitter identification number relative to
     * a specific system. This field shall be represented by an 8-bit unsigned
     * integer. This field allows the differentiation of multiple systems on an
     * entity, even if in some instances two or more of the systems may be
     * identical UA emitter types. Numbering of systems shall begin with the
     * value 1.
     */
    protected short acousticID;

    /**
     * Constructor
     */
    public AcousticEmitterSystem() {
    }

    public int getMarshalledSize() {
        int marshalSize = 0;

        marshalSize = marshalSize + 2;  // acousticName
        marshalSize = marshalSize + 1;  // acousticFunction
        marshalSize = marshalSize + 1;  // acousticID

        return marshalSize;
    }

    public void setAcousticName(int pAcousticName) {
        acousticName = pAcousticName;
    }

    public int getAcousticName() {
        return acousticName;
    }

    public void setAcousticFunction(short pAcousticFunction) {
        acousticFunction = pAcousticFunction;
    }

    public short getAcousticFunction() {
        return acousticFunction;
    }

    public void setAcousticID(short pAcousticID) {
        acousticID = pAcousticID;
    }

    public short getAcousticID() {
        return acousticID;
    }

    /**
     * Packs a Pdu into the ByteBuffer.
     *
     * @throws java.nio.BufferOverflowException if buff is too small
     * @throws java.nio.ReadOnlyBufferException if buff is read only
     * @see java.nio.ByteBuffer
     * @param buff The ByteBuffer at the position to begin writing
     * @since ??
     */
    public void marshal(java.nio.ByteBuffer buff) {
        buff.putShort((short) acousticName);
        buff.put((byte) acousticFunction);
        buff.put((byte) acousticID);
    } // end of marshal method

    /**
     * Unpacks a Pdu from the underlying data.
     *
     * @throws java.nio.BufferUnderflowException if buff is too small
     * @see java.nio.ByteBuffer
     * @param buff The ByteBuffer at the position to begin reading
     * @since ??
     */
    public void unmarshal(java.nio.ByteBuffer buff) {
        acousticName = (int) (buff.getShort() & 0xFFFF);
        acousticFunction = (short) (buff.get() & 0xFF);
        acousticID = (short) (buff.get() & 0xFF);
    } // end of unmarshal method 


    /*
  * The equals method doesn't always work--mostly it works only on classes that consist only of primitives. Be careful.
     */
    @Override
    public boolean equals(Object obj) {

        if (this == obj) {
            return true;
        }

        if (obj == null) {
            return false;
        }

        if (getClass() != obj.getClass()) {
            return false;
        }

        return equalsImpl(obj);
    }

    /**
     * Compare all fields that contribute to the state, ignoring transient and
     * static fields, for <code>this</code> and the supplied object
     *
     * @param obj the object to compare to
     * @return true if the objects are equal, false otherwise.
     */
    public boolean equalsImpl(Object obj) {
        boolean ivarsEqual = true;

        if (!(obj instanceof AcousticEmitterSystem)) {
            return false;
        }

        final AcousticEmitterSystem rhs = (AcousticEmitterSystem) obj;

        if (!(acousticName == rhs.acousticName)) {
            ivarsEqual = false;
        }
        if (!(acousticFunction == rhs.acousticFunction)) {
            ivarsEqual = false;
        }
        if (!(acousticID == rhs.acousticID)) {
            ivarsEqual = false;
        }

        return ivarsEqual;
    }
} // end of class
